Attachment for spring-balance scales.



PATENTED SEPT. 15, 1903.y

E `J. I'. MILLIGAN.

ATTACHMENT FOR SPRING BALANCE SCALES.

APPLICATION FILED APVB.. 4. 1902.

N0 MODEL.

UNITED STATES i'latented September 15, 1903.V f

PATENT OFFICE.

JOHN F. MILLIGAN, OF ST. LOUIS, MISSOURI, ASSIGNOR' OF ONE-HALF TO EUGENE E. STARR, OF ST. LOUIS, MISSOURI.

ATTACHMENT FOR SPRING-BALANCE SCALES'.

SPECIFICATION forming part of Letters Patent No. 739,266, dated September 15, 1903.

Application filed Apr] 4, 1902. Serial No. 101,347. (No model.)

.To all whom t may concer-n:

Be it known that I, JOHN F, MILLIGAN, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Attachments for Spring-Balance Scales, of which the following is a full, clear, and exact description, reference bein g-had to the accompanying drawings, forming part of this specification.

My invention relates to an attachment applied to the arbor of a spring-balance scale for the purpose of preventing the vibration of the pointer that traverses the dial of the scale, the construction being such that the pointer is brought immediately torest when any article is placed upon the panrof the scale instead of its being permitted to oscillate across the dial, as is usually the casein springbalance scales.

My invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Figure I is a front view of a spring-balance scale having my attachment applied thereto. Fig. II is a perspective view of the attachment. Fig. III is a section taken on line III III, Fig. I.

1 designates the housing of the scale, that carries the dial 2. The housing 1 containsv the mechanism usual to spring-balance scales that is connected to the reciprocating springactuated member 3, provided with the hook 4, on which the scale-pan is hung.

5 is the arbor-,to which the oscillating pointer 6, having a long arm and a short arm, is attached. The parts thus far described may be of any ordinary construction usual to spring-balance scales, as no inventionper se is herein claimed for them.

7 designates a plate loosely mounted upon the arbor 5 between the dial 2 and pointer 6, adapted for free rotation on said arbor, the plate being preferably in the form of'a disk, as shown, provided with a central arbor-receiving aperture 8. 0n the face of the 'plate 7 is a stud or projection 9, that projects sufficiently from said plate to provide for its contact with Ithe pointer 6.

In the practical use of a scale provided with 5o my attachment when an article is placed upon the scale-pan to be weighed the usual scale mechanism operates in the well-known manner, causing the pointer 6 to traverse the face of the scale-dial until it reaches a point thereon that indicates the weight of the article placed in the pan. Without the use of the attachment herein described the pointer vibrates to a considerable extent over the facev of the dial before reaching a settled position 6o after the article has been putin the scale-pan, this oscillation being al serious cause of delay and annoyance to the user of the scale that necessitates a wait until the pointer has become settled. In the use of my attachment the pointer 6 when movement is imparted thereto strikes against the stud 9, carried by the plate 7,'by either its long or short arm first striking the stud and shifts said'plate rocklingly on the scale-arbor, so that the stud will oscillate to the pointer at a position on the opposite side of the arbor from that originally struck, and therefore the movement of the pointer is opposed and brought immediately to rest instead of its vibration being continued, as usual.

It will be seen that the stud 9 is retained between the long and short arms of the pointer 6, so that on the return movement of the pointer to zero on the scale-dial one or the other of the pointer-arms first strikes said stud and throws it to the other arm to break` the vibratory movement of the pointer and bring it to rest quickly and positively.

While I have shown and described the plate 7.as bearing the stud 9, I do not desire to be limited to the plate being so provided, inasmuch as the desired end to be obtained by the use of my attachment may in a measure be obtained by the plate without the stud, which will act in the case of weighing small articles' to present a friction on the scale-arbor that will cause said arbor and the pointer carried thereby to be brought to rest and the vibration of the pointer prevented. T h'e plate 7 is approximately balanced ou the arbor 5, so that it will remain in any position to which it may be moved and so that it is adapted to 2, The combination with the arbor and a pointer, of a plate loosely mounted on the arbor and extending equidistant in all directions from the arbor, and a stud Carried by the plate and adapte-d to be engaged by the pointer to prevent vibrations of the pointer.

JOHN F. MILLIGAN.

In presence of- E. S. KNIGHT, M. P. SMITH. 

